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May 04, 2016

CPR for a Non-Responsive Console

On my HP 3000, after a short power blip, the console is now non-responsive. I can connect to the system's GSP port and the session is connected, but nothing is displayed. Neither <ctrl> A or <ctrl> B works. I type away, but get no response. I can then connect via VT-MGR and take the console :console !hpldevin and I receive all the console messages.

So, the messages are being sent (since I see them on the VT connection), but neither the physical console or the GSP gets any console messages. What can I try?

Gilles Schipper says

I believe a START NORECOVERY reboot is in order here. Since <ctrl> A <ctrl> B do not work, you will need to power-recycle the machine to effect a reboot. Presumably you would want to do this after gracefully stopping all jobs and asking online users to log off, if possible.

Depending upon which patch level your level of MPE is on, the :SHUTDOWN RESTART MPE command may also work from a logged-on session with at least OP capability.

Mark Ranft adds

If you haven't rebooted, I've seen similar issues. From the VT console can you try to do 'abortio 20' until it says no I/O to abort. A WHILE loop may make this easier. I've had luck with this in the past. But since Ctrl-B doesn't work, you may be out of luck.

Robert Thwaites notes

These are the simplest things to try first

<ctrl>Q (x-on)


Among the commonest issues: forgetting to do an x-on after a <ctrl>S (x-off) to stop output, so you can look at the line you are interested in. One time I saw another issue where someone had pressed <space> on the console and hadn't pressed <return>.

10:37 PM in Hidden Value, Homesteading, User Reports, Web Resources | Permalink

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